Joist blocker



FIG. 1 is a partial perspective view of a joist blocker.

FIG. 2 is a full-length front view thereof.

FIG. 2A is a partial front view thereof.

FIG. 2B is a partial front view thereof.

FIG. 2C is an enlarged partial front view thereof, showing section 2 cof FIG. 2.

FIG. 3 is an enlarged cross-section view taken along lines 3-3 of FIG.2A; and,

FIG. 4 is a bottom view of the joist blocker, the top view being amirror image thereof.

CLAIM I claim the ornamental design for a joist blocker, as shown anddescribed.